Ember.js Url中未定义的链接

Question

因为我在使用余烬的几天。 在观看了一些指南后，我试着制作一个类似于入门示例的余烬应用程序。

但我有问题，我找不到解决方案。 我构建了一个“帖子”模板，该模板显示了所有帖子的列表，其中有一个像作者等视图的参数。 然后我写了一个帖子模板，你可以在其中看到这篇文章的更多细节。 如果您在一个帖子上单击posts-List，那么它应该链接到带有帖子的新站点。 Post-Id应该在路由的url中，但是doesent work ..链接（或id）总是'undefined'。

模板：

<script type="text/x-handlebars" id="posts">
    <div class="container">
        <div class="row">
            <div class="col-md-10">
                {{#each}}
                <div class="postcontainer">
                    <div class = "voteSection">
                        <div class="pointAndVotingUp">
                            <span class="glyphicon glyphicon-circle-arrow-up"></span>
                        </div>
                        <div class="points">
                            {{votesUp}}
                        </div>
                        <div class="pointAndVotingDown">
                            <span class="glyphicon glyphicon-circle-arrow-down"></span>
                        </div>
                    </div>
                    <div class= "postSection">
                        <div class="post">
                            {{#link-to 'post' this }}
                            {{title}}
                            {{/link-to}}
                            {{format-markdown content}}
                            <small class="muted">asked {{format-date time}} by {{author}}</small>
                        </div>
                        <div class= "tagSection">
                            <div class= "tag">
                                {{tag1}}
                            </div>
                            <div class= "tag">
                                {{tag2}}
                            </div>
                            <div class= "tag">
                                {{tag3}}
                            </div>
                        </div>
                        <div class= "answerSection">
                                3 people already answered. 
                                {{#link-to 'post' this }}
                                    Submit your own answer...
                                {{/link-to}}
                            </div>
                    </div>
                </div>
                {{/each}}
            </div>
            <!--
            <div class="span9">
                {{outlet}}
            </div>
            -->
        </div>
    </div>
</script>

<script type="text/x-handlebars" id="post">
    <h1>{{title}}</h1>
    <hr>
    <!--
    <div class='intro'>
      {{format-markdown excerpt}}
    </div>
    -->

    <div class='below-the-fold'>
      {{format-markdown content}}
    </div>

    <h2>by {{author}} <small class='muted'>({{format-date date}})</small></h2>

    {{#if isEditing}}
    {{partial 'post/edit'}}
    <button class="btn btn-default" {{action 'doneEditing'}}>Done</button>
    {{else}}
    <button class="btn btn-default" {{action 'edit'}}>Edit</button>
    {{/if}}
  </script>

<script type="text/x-handlebars" id="post/_edit">
    <p>{{input type="text" value=title}}</p>
    <p>{{input type="text" value=excerpt}}</p>
    <p>{{textarea value=body}}</p>
</script>

EmberApp：

App.Router.map(function () {
    this.resource('about');
    this.resource('posts');
    this.resource('post', { path: '/posts/:post_id'});
});
App.PostsRoute = Ember.Route.extend({
    model: function() {   

          return jQuery.getJSON("/posts/" + params.post_id);
    }
});
App.PostRoute = Ember.Route.extend({
    model: function(params) {
       return posts.findBy('id', params.post_id);     
    },
    serialize: function(model) {
    // this will make the URL `/posts/12`
    return { post_id: model.id };
  }
});

App.PostController = Ember.ObjectController.extend({
    isEditing: false,

    actions: {
        edit: function() {
            this.set('isEditing', true);
        },
        doneEditing: function() {
            this.set('isEditing', false);
        }
    }

});

目前这些帖子都是硬编码的：

var posts = [{
    _id: '1',
    points: 10,
    title: "foo title",
    author: { name: "Hans" },
    date: new Date(2013, 11, 12), 
    excerpt: "foo text foo"
}, ...

有人可以告诉我哪里出错了吗？

Settings:
DEBUG: ----ember-1.2.0.js:3386
DEBUG: Ember      : 1.2.0 ember-1.2.0.js:3386
DEBUG: Handlebars : 1.1.2 ember-1.2.0.js:3386
DEBUG: jQuery     : 1.10.2 ember-1.2.0.js:3386
DEBUG: -------------------------------